Reamer



July 5,1927. 1,635,067 y J. R. AULENBACK REAMER Filed May 11, 1923 k I4o 21 1 M 16 15 1 44 A /4Z l( INVENTOR WITNESS:

' ATTORNEY Patented July 5, 1927.

UNITED STATES JAMES ROY AULENBACK, OF BRIDGEWATER, NOVA SCOTIA, CANADA.

BEAMER. i

Application filed May 11,

This invention relates to improvements in reamers and has for an objectthe provision of a tool of this character wherein the cutters may beadjusted to regulate the diameter of an opening, novel means beingprovided wherein this adjustment may be accurately and expeditiouslyeffected.

With the aboveand other objects in view, the invention further includesthe following novel features and details of construction, to behereinafter more fully'described, illustrated in the accompanyingdrawings and pointed out in the appended claim.

In the drawings Figure 1 is an elevation of a roaming tool constructedin accordance with the invention.

Figure 2 is a central longitudinal sectional view of the same.

Figure 3 is a transverse section through the mandrel and the cutters.

Figure 4 is a similar view through the opposite end of the tool andshowing the manner of holding the cutter retaining means in place.

Figure 5 is an enlarged longitudinal sectional view through the mandrelend of the tool and illustrating by dotted lines the manner of adjustingthe cutters.

Referring in detail to the drawings, wherein like characters ofreference denote corresponding parts, the form of the invention shown inFigures 1 to 5 inclusive includes a shank 15 and a mandrel 16 which maybe detachably secured together and may have an interlocking connectionwhich includes diametrically oppositek lugs 17 which extend from theshank and engage notches or recesses 18 provided in the adjacent end ofthe mandrel 16. The shank and mandrel are hollow and the outer end ofthe mandrel is provided with a head 19 having longitudinally disposedspaced grooves 29 therein. These grooves are adapted to removablyreceive cutters 21. These cutters as illustrated include beveledshoulders 22 and relatively narrow outer ends 23. The beveled shoulders22 are adapted for engagement by a head 24 positioned within arelatively large bore provided in the outer extremity of the mandrelhead 19.

The head 24 at one end of a rod 26 extends upward through the mandreland shank. This head 24 may be rigid with the rod 26, or may consist ofa disk 27 rigid with the rod and a ring 28 mounted upon the disk.

1923. Serial No. 638,359.

This ring is provided with an annular seat for the reception of the disk27 and the opposite edge of the ring is beveled as at 30 for engagementwith the beveled shoulders 22 of the cutters 21. f

The inner end of the rod 26 is provided with a transversely arrangedelongated slot 31 which is adapted to be brought into register with arelatively long slot 32 provided in .the shank 15, the slots 31and`32being adapted toy receive a flat pin 33 whose.

opposite ends extend beyond the periphery of the shank. The ends of thepin 33 are engaged by a flange 34 which is carried at one end of asleeve 35, the latter having a threaded en agement as at 36 with theshank 15, so that y screwing the sleeve upon the shank, the rod 26 maybe drawn inward so that the beveled edge of the ring 28 will engage thebeveled shoulders 22 of the cutters 21 and draw the latter inward.

Threaded upon the inner end of the mandrel 16 is a sleeve 37 which isprovided at one end with an inwardly extending beveled edge 38. The edge38 is adapted to engage the beveled ends 39 of the cutters 21 so thatthe latter will be securely held in place. Also by adjusting the sleeve35 and the sleeve 37, the outer ends lof the cutters 21 may be moveddiametrically outwardso as to engage the diameter of the cut. Tofacilitate operation of the sleeves 35 and 37, the

latter are preferably ymilled or knurled upon the outer peripheries,while the last mentioned sleeve may have extending therefrom a milledpin 40. y

The sleeve 37 has its inner end beveled and graduated as at 41, thesegraduations being adjusted relatively to the point 0 upon the mandrel asindicated at 42 so as to regulate the diametricaladjustment of thecutters.

The cutters may thus be adjusted to a frac-y tion of an inch and thebore .of the opening nicely regulated.

The milled and graduated portion of the sleeve 37 is formed upon aseparate section from the remainder of said sleeve and is relativelyadjustable so that the graduations 41 may be adjusted by rotatablyadjusting the milled and graduated section of the sleeve with respect tothe remaining section. This permits of adjustment to overcome wear. Thesections of the sleeve 37 are held against relative movement by means ofa set screw Tf desired, the inner end of the shank 15 may be internallythreaded for removable engagement with the threaded end oic an eX-tension 43 and this extension may be provided with a wrench engagingportion 44, whereby the tool may be hand operated.

Through the adjustment of the sleeves 35.

and 37, the cutters may be adjusted to gradually increase the diameterof the cut until the desired diameter' is obtained.

The invention is susceptible of various changes in its form, proportionsand minor details oi construction and the right is herein reserved tomake such changes as properly fall within the Scope of the appendedclaim.

Having described theinvention what is claimed is A reamer embodying ahollow shank having diametrically opposed lugs extendingfrom its outerend, a hollow mandrel havfJ ino notches provided at its inner end toreceive the lugs of the shank, said mandrel also having spacedlongitudinally disposed slots the slots having inclined bottoms and asocket in ils outer end, a ring` receivable within the socket and havingan annular' transversely right angular seat in one face and a beveledannular seat within its opposite iace, cutter blades arranged within theslots, heveled shoulders upon the blades to engage the beveled seat,arod mounted within the mandrel and shank, a head Vupon the outer end ofthe rod for position within the right angular seat, a. sleeve threadedlyadjustable upon the mandrel and having an inwardly beveled edge toprovide beveled engagement between the sleeve and the adjacent ends ofthe blades, and means to rotate the shank and rod.

JAMES ROY AULENBACK.

